dauber



(No Model.) 2 Sheets-Sheet 1.

A. DAUBER.

REGENERATIVE 0R REOUPERATIVB FURNACE Patnted Nov. '19, 1895;

Witnesses Inventor W k- "5"- ANDREW B GRAHAM. momu-mo. WASHINGTON. v.

(No Model.) 2 Sheets-8heet 2.

A. DAUBER.

REGENERATIVB 0R REOUPERATIVE FURNACE.

No. 549,996.v Patented Nov. 19, 1895.

:5 N J M YFYI Witnesses lnvm 01 NITED STATES PATENT OFFICE.

AUGUST DAUBER, OF BOOHUM, GERMANY.

REG EN ERATIVE OR RECUPERATIVE FURNACE.

SPECIFICATION formingpart of Letters Patent No. 549,996, dated November 19, 1895.

Application filedOctober 12, 1894. Serial No. 525,655. (No model.) Patented in Germany September 4, 1893, No. 77,399; in France september 17, 1894, No. 228,372, and in Belgium September 22, 1894,11'0. 85,438-

To all whom it may concern.-

Be it known that 1, AUGUST DAUBER, a subject of the Emperor of Germany, residing at Bochuin, in the Province of WVestphalia, Germany, have invented a new and useful In1- provement in Regenerative or Recuperative Furnaces, (for which I have obtained a patent in Germany, No. 77,399, bearing date September 4, 1893; in France, No. 228,372, bearing date September 17, 1894, and in Belgium, No. 85,438, bearing date September 22, 189 1,) of which the following is a specification.

My invention relates to a new arrangement of the channels for leading away the hot gases coming from a furnace into the chimneyand the arrangement of pipes placed in these channels for heating the air and heating gases for the furnace. These channels and gas and air heating pipes being so arranged that the current of the hot gases on the one side and the currents of the air andheating gases on the other side can run in the same direction or in opposite directions at will, and that both the air and the heating gases can be heated by the outgoing gases or the air alone continuously without requiring a change of the current of the hot gases from one regenerator to another; in fact, without requiring a regenerator in the sense in which this term is generally understood, at all I attain these objects by the arrangement illustrated in the This is of importance.

accompanying drawings, in which Figure 1 is a longitudinal section of the furnace along line II of Fig. 2. Fig. 2 is a vertical cross-section along line III III of Fig. 1. Fig. 3 is a horizontal section along line II II of Fig. 1. Fig. 4 is a top view and horizontal section along line IV IV of Fig. 1. Fig. 5 is a vertical section along line VI VI of Fig. 1. Fig. 6 is a cross-section along line V V of Fig. 3. Fig. 7 is a section along line VII VII 0 Fig. 1. 7

From the furnace A the hot gasesare led out through the narrow passage 13 into the channels 0. The narrowing of this passage has for its object to protract the exit-current of the hot gases from the furnace A, so that a complete burning and consumption of the heating-gases in the furnace can take place and the highest degree of heat canbe obtained. At the foot of this channel a flap-valve or door D is arranged, which can either stand horizontally or upright, as shown in full and dotted lines. A counterweighted lever D holds the valve in one or, the other position. When it lies horizontal, the channel E is open and the gases pass along this channel toward the right side of the furnace, where they are carried into the down channels F F at both sides of the furnace, to be led into the zigzag channel G, whence they are led away into the channel H, that communicates with a chimney. A door J, which in this case is open, allows the exit of the gas. When the door or valve D, however, stands upright it ,closes the passage into the channel E and the gases go down direct into the zigzag channel G, (the door J in this case being of course closed,) and in the channel G the gases go toward the right side of the furnace and here down into the outlet channel K, which leads to the chimney-channel H. Avalve or door L is provided for between the zigzag channel G and the outletchannel K. Now into the zigzag channel G, I place the air-conducting pipes M, having open entrance ends at X, Figs. 1 and 2, so that they are completely surrounded by the hot gases from the furnace, whether they go the one way or the other. From the pipes M the air goes up the channels N and thence into the furnace, as I shall explain farther on. I

The heating-gases are introduced into the recuperator by a channel 0 and regulatingvalves 1? P, which are arranged in the two branches 0 and O of the channel 0. By means of the rods and levers R R R the valves P P are so governed that when the one is opened the other is closed, and vice versa, and thus the gases can be conducted to the furnace either through the channel 0 or 0 In. the first case it is led to the pipes S, arranged in the zigzag channel G at the side of the air-pipes M, and it is there heated by the hot gases from the furnace. The pipes S lead it into the uptakes S and into a common horizontal channel Y at the top, Fig. 7. In the other case the gas is led through the branch 0 direct into the uptakes S between the pipes N and S into the said horizontal channel. Now from this channel inclined channels T, which meet with the inclined channels U of the air-pipes, are so directed toward the furnace A that both gas and air are mixed in a widened chamber V just before the entrance of the furnace, and the gas mixed with the air in the widened chamber V is led into the furnace by passing the perforated baffle' plates V, which further assist the mixing of air and gas, so that it can be thoroughly burned.

I am aware that regenerative and recupen ative furnaces have been used before, and I do not generally claim a patent for such a furnace; but

\Vhat I claim is 1. In combination with a furnace A having a narrowed passage B and a channel 0 for the exit of the hot gases a channel E and a zigzag channel G, a door D at the end of channel 0 and a door L at the end of zigzag channel G; the gas pipes S and air fines Mplaced in said zigzag channel G and ending in uptakes S and N respectively, both of these communicatin g at the upper end with a common mixing chamber V, from which the mixed gas and air are discharged into the furnace A.

2. In combination with a furnace A having a narrowed passage B and a channel 0 for the exit of the hot gases, the zigzag channel G, in which are placed air and gas heating pipes M and S respectively; the combined regulatin g valves P, P in a gas main 0 at the side of the furnace, said valves communicating with channels 0, 0 respectively, the first one of which is connected to the gas pipes in the zigzag channel G, the other one, 0 leading direct to the uptakes S between the uptakes S and N at the other side of the furnace; the whole as illustrated and for the purpose set forth.

AUGUST DAUBER.

\Vitnesses T. 11. STRAUSS, A. STRAUSS. 

